CN105337007B - A kind of manufacturing method of cavity filter cover board - Google Patents
A kind of manufacturing method of cavity filter cover board Download PDFInfo
- Publication number
- CN105337007B CN105337007B CN201510785096.1A CN201510785096A CN105337007B CN 105337007 B CN105337007 B CN 105337007B CN 201510785096 A CN201510785096 A CN 201510785096A CN 105337007 B CN105337007 B CN 105337007B
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- stretching
- machine
- plate
- oil pressure
- cover board
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
- H01P11/002—Manufacturing hollow waveguides
Abstract
A kind of manufacturing method of cavity filter cover board,Including selection,Positioning,Processing tuning threaded hole,Plate is stretched by oil pressure stretching-machine,During stretching by the one of cover board copper towards aluminium one side stretch,According to the thickness of plate and material drawing die is needed to be equipped with multiple stations,Stretching start after first by the plate Rapid stretching of the tuning screw thread hole site determined on cover board to just determining station,Then multi-drawing from fast to slow,Oil pressure stretching-machine will be after plate stretch to last station,Stretching-machine starts to be slowly returned to original position,The processing head of stretching-machine is quick anti-secondary at most during return,Repeatedly anti-top post-tensioning machine returns to original position,Oil pressure stretching-machine processes a boss with cover board one in tuning screw thread hole location at this time,The center section of boss is hollow,The present invention handles stretching problem using hydraulic press,It is punched compared to traditional approach with press machine,The yield rate higher of the present invention,The effect of manufacture is also more preferable.
Description
Technical field
The present invention relates to field of signal processing more particularly to a kind of manufacturing methods of cavity filter cover board.
Background technology
At present, the signal processing of cavity body filter is usually completed by the tuning Self-locking screw on filter cover board, generally
For tuning screw handle the problem of be signal intermodulation the problem of, in particular to two different frequency signals, in a certain system
The signal for the new frequency for being superimposed and generating.
The plate of current common filter lid board fabrication method generally use is pure copper material or electroplating surface copper
Metal material, cost is higher, and what is processed is mostly the tuned window for needing mating tuning swivel nut, and uses punching press during processing mostly
Mode process tuned window, one side impact style is easily damaged cover board, and defect rate is higher, the tune on the other hand processed
Humorous hole also needs additionally mounted upper tuning swivel nut, and the modes such as tuning swivel nut use is welded, pressed, gluing are fixed on tuned window, are adjusted
The installation of humorous swivel nut not only needs cost of labor and processing cost, meanwhile, this tuning swivel nut in addition installed additional on tuned window
And it is unstable, it is easy for generating loosening, and the interface also simultaneously out-of-flatness of tuned window and tuning swivel nut after a period of time, most
Actual tuning effect is influenced eventually.
The content of the invention
The present invention is intended to provide a kind of manufacturing method of cavity filter cover board.
In order to solve the above technical problems, the present invention is using following technical scheme, a kind of manufacturer of cavity filter cover board
Method comprises the following steps：
Step 1：Suitable plate is chosen in the case of selection, considering cost and performance, plate is closed using copper aluminium
Gold, the alloy are Copper-Aluminum compound one alloy, i.e. one side is copper, is on one side aluminium, to plate if the size of plate is improper
Carry out appropriate cut；
Step 2：Positioning determines the position in tuning threaded hole and cover screw hole according to the actual conditions of filter cavity；
Step 3：Cover screw hole is processed, after the position in cover screw hole is determined, stamps out cover board spiral shell using lathe
Nail hole；
Step 4：Processing tuning threaded hole, when processing, stretch plate using oil pressure stretching-machine, by cover board during stretching
The one side of the one of copper towards aluminium stretches, and stretches the punch-pin that plate uses and is placed on the hydraulic cylinder of hydraulic press, cavity plate is placed in hydraulic press
Pedestal on, according to the thickness of plate and material drawing die is needed to be equipped with multiple stations, stretching first will be on cover board after starting
The plate Rapid stretching of the tuning screw thread hole site determined is to just determining station；
Step 5：Just determine described at station, oil pressure stretching-machine exerts a force perpendicular to lid surface direction, according to the thickness of plate
Degree and material carry out cover board multi-drawing processing, and stretching-machine sets different tensile speeds according to the station on drawing die,
From station is just determined to a last station, from fast to slow, stretching-machine will determine the speed of stretching on cover board from fast to slow with regard to this
The plate stretch of good tuning screw thread hole site is to corresponding station, until oil pressure is drawn after plate is stretched to the last one station
It stretches machine and stops force；
Step 6：By after plate stretch to last station, stretching-machine starts to be slowly returned to original position oil pressure stretching-machine, draws
It is quick anti-secondary at most during return to stretch the processing head of machine, repeatedly instead pushes up post-tensioning machine and returns to original position, oil pressure stretches at this time
Machine processes a boss with cover board one in tuning screw thread hole location, and the center section of boss is hollow, the inner ring of boss
It is aluminium for copper, outer ring；
Step 7：Screw thread, boss internal thread holes are processed inside the inside of boss and cover screw hole using lathe
The diameter of the swivel nut of formation is more than the diameter of undressed part inside boss.
Preferably, the thickness of the plate is 1-3mm.
Preferably, including the copper of 10-20% in the albronze that the plate uses, residual components are aluminium.
Preferably, 10% copper and 90% aluminium are included in the albronze that the plate uses.
Preferably, the height that oil pressure stretches the boss of machining is 1-20mm.
Preferably, the swivel nut that the threaded hole that step 7 processes inside boss is formed is applicable in the tuning of M5-M10 specifications
Self-locking screw.
Preferably, oil pressure stretching-machine carries out at least 3 stretch process to the last one station from station is just determined to cover board.
Preferably, oil pressure stretching-machine realizes tensile speed from fast to slow by cylinder.
Preferably, hydraulic press is equipped with hydraulic circuit, anti-top of the hydraulic circuit restrained stretching machine during return.
Compared with traditional filter lid board fabrication method, the present invention is all used as the material of plate using albronze
Material, common filter cover board is mostly using electroplating surface copper or the plate of fine copper in the market, regardless of being fine copper or plating
The cost of copper is all relatively high, is on the one hand because the aluminium of accounting majority is relatively cheap using albronze, is made using aluminium
Material cost can greatly be saved by making cover board, and the quality of another aspect aluminium and copper is softer, and processing is got up easily, also save plus
Work cost, while the considerations of for using copper good electric conductivity, albronze it is cost-effective and meanwhile can also play with it is pure
The same conductive effect of copper coin material, because the cover board of the present invention is also provided with tuning threaded hole extends to cavity direction and plate
The hollow boss in the integrally formed center section of material, the inner ring of boss is copper, outer ring is aluminium, is released inside boss with adjusting screw
Part for copper, do not interfere with actual conductive effect；The present invention replaces traditional tuned window and tuning swivel nut using boss
Combination, be because processing boss only plate need to be stretched, using lathe with regard to tuning threaded hole can be automatically performed
Processing, without still further by stamping out tuned window and fixed tuning two sets of processes of swivel nut, which is to pass through plate
What the material of material processed, the present invention while process is saved will not also waste of materials, and integrally formed boss is very
It is firm, the effect of tuning is not interfered with, and the present invention uses oil pressure stretching-machine to be adjusted to carry out stretch process to cover board to process
Humorous threaded hole carries out multi-drawing processing according to the thickness of plate and material to cover board, and stretching-machine is according to the work on drawing die
Position sets different tensile speed, from station is just determined to a last station, the speed of stretching from fast to slow, stretching-machine with regard to this by
Near slowly by the plate stretch of the tuning screw thread hole site determined on cover board to corresponding station, until plate is stretched to
Oil pressure stretching-machine stops force after the last one station, the hydraulic press used compared with the punch forming originally used, the present invention
It, then can with propulsion plate to the corresponding station of cylinder control hydraulic press from fast to slow quickly by plate stretch to just station is determined
So that plate adapts to the pulling force of hydraulic press application at leisure, be not in waste product problem caused by punch forming, and the present invention is excellent
The stretch process of three-stage is selected then to take into account man-hour and yield rate, is worked well, while hydraulic press finally can also be quickly repeatedly anti-
Top, this process can eliminate the stress that metal generates after cover board is stretched, it is ensured that the quality of the tuned window processed, not
Slight deformation can be generated by eliminating the tuning threaded hole of metal stresses, final to influence tuning effect；In view of present filter tune
Humorous actual demand, the specification for tuning Self-locking screw is at present M5-M10, and accordingly, the thickness of cover board need to be only controlled in 1-3mm
, such cover board is light and does not influence using effect, further saves material cost, tunes the height of swivel nut and can also control
System is in 1-20mm, it is sufficient to meet the requirement of Self-locking screw；It is additionally provided with inside boss of the present invention along its axis direction and screw thread
Unprocessed part inside the tuned window that hole connects, i.e. boss, the section diameter are less than threaded bore portions, form a tuning
Hole, for the tuned window compared with threaded hole closer to the cavity of wave filter, the diameter of tuned window is less than filter tuner Self-locking screw
Diameter, form capacitance between the inner wall and tuning screw of boss inner ring so that be able on cover board introduce capacity plate antenna effect,
Reduce the current density of tuning screw and cover board binding site, reduce because the intermodulation of tuning screw and cover board loose contact generation is believed
Number level, improves the intermodulation first-pass yield of cavity body filter, and the front end of screw departs from downwards when threaded hole enters tuning porose area and can squeeze
Tuned window is opened, and tunes bore dia less than threaded hole, it is contemplated that the material of tuned window is copper, and the good elastic force of copper can promote to tune
Hole inwardly squeezes and preferably locks Self-locking screw, and filter cover board is saved also without an additionally mounted elastic sheet metal
Material and manually.
Description of the drawings
Fig. 1 is the flow chart of the present invention；
Fig. 2 is the schematic diagram of product produced by the present invention；
Fig. 3 is the schematic diagram of present invention manufacture product boss.
In figure：1st, plate；2nd, boss；3rd, threaded hole；4th, tuned window；5th, cover screw hole.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, unless otherwise prescribed with limit, it is necessary to explanation, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be the connection inside mechanical connection or electrical connection or two elements, it can
To be to be connected directly, can also be indirectly connected by intermediary.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
Referring to a kind of manufacturing method of Fig. 1 to Fig. 2 descriptions cavity filter cover board according to embodiments of the present invention, bag
Include following steps：
Step 1：Suitable plate 1 is chosen in the case of selection, considering cost and performance, plate 1 is closed using copper aluminium
Gold, the alloy are Copper-Aluminum compound one alloy, i.e. one side is copper, is on one side aluminium, to plate if the size of plate 1 is improper
1 carries out appropriate cut；
Step 2：Positioning determines the position in tuning threaded hole and cover screw hole 5 according to the actual conditions of filter cavity
It puts；
Step 3：Cover screw hole 5 is processed, after the position in cover screw hole 5 is determined, stamps out cover board using lathe
Screw hole 5；
Step 4：Processing tuning threaded hole, when processing, stretch plate 1 using oil pressure stretching-machine, and when stretching will cover
The one side of the one of plate copper towards aluminium stretches, and stretches the punch-pin that plate uses and is placed on the hydraulic cylinder of hydraulic press, cavity plate is placed in oil pressure
On the pedestal of machine, multiple stations are equipped with according to the drawing die that needs of the thickness of plate and material, stretching start after first by cover board
On the plate Rapid stretching of tuning screw thread hole site that determines to just determining station；
Step 5：Just determine described at station, oil pressure stretching-machine exerts a force perpendicular to lid surface direction, according to the thickness of plate
Degree and material carry out cover board multi-drawing processing, and stretching-machine sets different tensile speeds according to the station on drawing die,
From station is just determined to a last station, from fast to slow, stretching-machine will determine the speed of stretching on cover board from fast to slow with regard to this
The plate stretch of good tuning screw thread hole site is to corresponding station, until oil pressure is drawn after plate is stretched to the last one station
It stretches machine and stops force；
Step 6：By after plate stretch to last station, stretching-machine starts to be slowly returned to original position oil pressure stretching-machine, draws
It is quick anti-secondary at most during return to stretch the processing head of machine, repeatedly instead pushes up post-tensioning machine and returns to original position, oil pressure stretches at this time
Machine tuning screw thread hole location process a boss 2 with cover board one, the center section of boss 2 is hollow, boss 2 it is interior
It is aluminium to enclose as copper, outer ring；
Step 7：Screw thread, 2 internal whorl of boss are processed inside the inside of boss 2 and cover screw hole 5 using lathe
The diameter for the swivel nut that hole 3 is formed is more than the diameter of the 2 undressed part in inside of boss.
Preferably, the thickness of the plate 1 is 1-3mm.
Preferably, including the copper of 10-20% in the albronze that the plate 1 uses, residual components are aluminium.
Preferably, 10% copper and 90% aluminium are included in the albronze that the plate 1 uses.
Preferably, the height that oil pressure stretches the boss 2 of machining is 1-20mm.
Preferably, the swivel nut that the threaded hole that step 7 processes inside boss 2 is formed is applicable in the tune of M5-M10 specifications
Humorous Self-locking screw.
Preferably, oil pressure stretching-machine carries out at least 3 stretch process to the last one station from station is just determined to cover board.
Preferably, oil pressure stretching-machine realizes tensile speed from fast to slow by cylinder.
Preferably, hydraulic press is equipped with hydraulic circuit, anti-top of the hydraulic circuit restrained stretching machine during return.
Compared with traditional filter lid board fabrication method, the present invention is all used as the material of plate using albronze
Material, common filter cover board is mostly using electroplating surface copper or the plate of fine copper in the market, regardless of being fine copper or plating
The cost of copper is all relatively high, is on the one hand because the aluminium of accounting majority is relatively cheap using albronze, is made using aluminium
Material cost can greatly be saved by making cover board, and the quality of another aspect aluminium and copper is softer, and processing is got up easily, also save plus
Work cost, while the considerations of for using copper good electric conductivity, albronze it is cost-effective and meanwhile can also play with it is pure
The same conductive effect of copper coin material, because the cover board of the present invention is also provided with tuning threaded hole extends to cavity direction and plate
The hollow boss in the integrally formed center section of material, the inner ring of boss is copper, outer ring is aluminium, is released inside boss with adjusting screw
Part for copper, do not interfere with actual conductive effect；The present invention replaces traditional tuned window and tuning swivel nut using boss
Combination, be because processing boss only plate need to be stretched, using lathe with regard to tuning threaded hole can be automatically performed
Processing, without still further by stamping out tuned window and fixed tuning two sets of processes of swivel nut, which is to pass through plate
What the material of material processed, the present invention while process is saved will not also waste of materials, and integrally formed boss is very
It is firm, the effect of tuning is not interfered with, and the present invention uses oil pressure stretching-machine to be adjusted to carry out stretch process to cover board to process
Humorous threaded hole carries out multi-drawing processing according to the thickness of plate and material to cover board, and stretching-machine is according to the work on drawing die
Position sets different tensile speed, from station is just determined to a last station, the speed of stretching from fast to slow, stretching-machine with regard to this by
Near slowly by the plate stretch of the tuning screw thread hole site determined on cover board to corresponding station, until plate is stretched to
Oil pressure stretching-machine stops force after the last one station, the hydraulic press used compared with the punch forming originally used, the present invention
It, then can with propulsion plate to the corresponding station of cylinder control hydraulic press from fast to slow quickly by plate stretch to just station is determined
So that plate adapts to the pulling force of hydraulic press application at leisure, be not in waste product problem caused by punch forming, and the present invention is excellent
The stretch process of three-stage is selected then to take into account man-hour and yield rate, is worked well, while hydraulic press finally can also be quickly repeatedly anti-
Top, this process can eliminate the stress that metal generates after cover board is stretched, it is ensured that the quality of the tuned window processed, not
Slight deformation can be generated by eliminating the tuning threaded hole of metal stresses, final to influence tuning effect；In view of present filter tune
Humorous actual demand, the specification for tuning Self-locking screw is at present M5-M10, and accordingly, the thickness of cover board need to be only controlled in 1-3mm
, such cover board is light and does not influence using effect, further saves material cost, tunes the height of swivel nut and can also control
System is in 1-20mm, it is sufficient to meet the requirement of Self-locking screw；It is additionally provided with inside boss of the present invention along its axis direction and screw thread
Unprocessed part inside the tuned window that hole connects, i.e. boss, the section diameter are less than threaded bore portions, form a tuning
Hole, for the tuned window compared with threaded hole closer to the cavity of wave filter, the diameter of tuned window is less than filter tuner Self-locking screw
Diameter, form capacitance between the inner wall and tuning screw of boss inner ring so that be able on cover board introduce capacity plate antenna effect,
Reduce the current density of tuning screw and cover board binding site, reduce because the intermodulation of tuning screw and cover board loose contact generation is believed
Number level, improves the intermodulation first-pass yield of cavity body filter, and the front end of screw departs from downwards when threaded hole enters tuning porose area and can squeeze
Tuned window is opened, and tunes bore dia less than threaded hole, it is contemplated that the material of tuned window is copper, and the good elastic force of copper can promote to tune
Hole inwardly squeezes and preferably locks Self-locking screw, and filter cover board is saved also without an additionally mounted elastic sheet metal
Material and manually.
In the description of this specification, the description meaning of reference term " one embodiment ", " example " or " some examples " etc.
Refer at least one reality that the present invention is contained in reference to the embodiment or example particular features, structures, materials, or characteristics described
It applies in example or example.In the present specification, schematic expression of the above terms is not necessarily referring to identical embodiment or shows
Example.Moreover, particular features, structures, materials, or characteristics described can be in any one or more embodiments or example
It combines in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (8)
1. a kind of manufacturing method of cavity filter cover board, which is characterized in that comprise the following steps：
Step 1：Suitable plate is chosen in the case of selection, considering cost and performance, plate uses albronze, should
Alloy is Copper-Aluminum compound one alloy, i.e. one side is copper, is on one side aluminium, plate is fitted if the size of plate is improper
When cut；
Step 2：Positioning determines the position in tuning threaded hole and cover screw hole according to the actual conditions of filter cavity；
Step 3：Cover screw hole is processed, after the position in cover screw hole is determined, stamps out cover screw using lathe
Hole；
Step 4：Processing tuning threaded hole, when processing, stretch plate using oil pressure stretching-machine, by cover board copper during stretching
One stretches towards the one side of aluminium, stretches the punch-pin that uses of plate and is placed on the hydraulic cylinder of oil pressure stretching-machine, cavity plate is placed in oil pressure drawing
It stretches on the pedestal of machine, according to the drawing die that needs of the thickness of plate and material, equipped with multiple stations, stretching first will lid after starting
The plate Rapid stretching of the tuning screw thread hole site determined on plate is to just determining station；
Step 5：It is described just determine at station, oil pressure stretching-machine perpendicular to lid surface direction exert a force, according to the thickness of plate with
Material carries out cover board multi-drawing processing, and oil pressure stretching-machine sets different tensile speeds according to the station on drawing die,
Station is determined to a last station from just, and from fast to slow, oil pressure stretching-machine from fast to slow will be on cover board with regard to this for the speed of stretching
The plate stretch of the tuning screw thread hole site determined is to corresponding station, until plate is stretched to oil after the last one station
Stretching-machine is pressed to stop force；
Step 6：By after plate stretch to last station, oil pressure stretching-machine starts to be slowly returned to original position oil pressure stretching-machine, oil
The processing head for pressing stretching-machine is quick anti-secondary at most during return, and oil pressure stretching-machine is equipped with hydraulic circuit, hydraulic circuit control
Liquefaction presses anti-top of the stretching-machine during return, and repeatedly oil pressure stretching-machine returns to original position behind anti-top, and oil pressure stretching-machine exists at this time
Tuning screw thread hole location processes a boss with cover board one, and the center section of boss is hollow, the inner ring of boss be copper,
Outer ring is aluminium；
Step 7：Screw thread is processed inside the inside of boss and cover screw hole using lathe, boss internal thread holes are formed
The diameter of swivel nut be more than the diameter of undressed part inside boss.
2. manufacturing method according to claim 1, which is characterized in that the thickness for the plate that step 1 is selected is 1-3mm.
3. manufacturing method according to claim 1, which is characterized in that 10- is included in the albronze that the plate uses
20% copper, residual components are aluminium.
4. manufacturing method according to claim 3, which is characterized in that 10% is included in the albronze that the plate uses
Copper and 90% aluminium.
5. manufacturing method according to claim 1, which is characterized in that the height that oil pressure stretches the boss of machining is 1-
20mm。
6. manufacturing method according to claim 1, which is characterized in that the threaded hole shape that step 7 processes inside boss
Into swivel nut be applicable in the tuning Self-locking screws of M5-M10 specifications.
7. manufacturing method according to claim 1, which is characterized in that oil pressure stretching-machine is from just determining station to the last one work
Position carries out at least 3 stretch process to cover board.
8. manufacturing method according to claim 1, which is characterized in that oil pressure stretching-machine realizes tensile speed by cylinder
From fast to slow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510785096.1A CN105337007B (en) | 2015-11-17 | 2015-11-17 | A kind of manufacturing method of cavity filter cover board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510785096.1A CN105337007B (en) | 2015-11-17 | 2015-11-17 | A kind of manufacturing method of cavity filter cover board |
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| Publication Number | Publication Date |
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| CN105337007A CN105337007A (en) | 2016-02-17 |
| CN105337007B true CN105337007B (en) | 2018-05-22 |
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| CN201510785096.1A Active CN105337007B (en) | 2015-11-17 | 2015-11-17 | A kind of manufacturing method of cavity filter cover board |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TW201912989A (en) * | 2017-08-24 | 2019-04-01 | 祥偉自動科技股份有限公司 | Fixing seat, combination frame using same and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916895A (en) * | 2010-08-20 | 2010-12-15 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| CN204156069U (en) * | 2014-11-24 | 2015-02-11 | 深圳市欣天科技股份有限公司 | A kind of cavity body filter |
| CN204632892U (en) * | 2014-12-31 | 2015-09-09 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer and radio frequency remote equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101094759B1 (en) * | 2009-08-04 | 2011-12-16 | 주식회사 알림테크놀러지 | Method for Combining Cover of Radio Frequency Filter and Radio Frequency Filter Produced by the Method |
| TWI505541B (en) * | 2013-03-29 | 2015-10-21 | Hon Hai Prec Ind Co Ltd | Cavity filter |
-
2015
- 2015-11-17 CN CN201510785096.1A patent/CN105337007B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916895A (en) * | 2010-08-20 | 2010-12-15 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| CN204156069U (en) * | 2014-11-24 | 2015-02-11 | 深圳市欣天科技股份有限公司 | A kind of cavity body filter |
| CN204632892U (en) * | 2014-12-31 | 2015-09-09 | 深圳市大富科技股份有限公司 | Cavity body filter, duplexer and radio frequency remote equipment |
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| CN105337007A (en) | 2016-02-17 |
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